Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 150gr | Peregrine Plainsmaster (VLR-4) bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and ReloadSwiss RS 60.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 55,056 psi | 88% | 2953 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 53,766 psi | 86% | 2972 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,622 psi | 89% | 3045 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,895 psi | 85% | 2972 fps | 96.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,136 psi | 72% | 2923 fps | 96.9% |
| Accurate 4064 | <<locked>> | 88% | 54,172 psi | 87% | 3025 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,578 psi | 88% | 3117 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 84% | 54,273 psi | 87% | 3058 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 55,579 psi | 89% | 3064 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,287 psi | 85% | 3009 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,331 psi | 87% | 2982 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,404 psi | 87% | 3186 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,898 psi | 90% | 3087 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,333 psi | 90% | 3110 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,782 psi | 89% | 3182 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,476 psi | 86% | 3156 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,757 psi | 69% | 2953 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,660 psi | 78% | 3140 fps | 99% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,302 psi | 87% | 3071 fps | 99.7% |
| Bofors RP3 | <<locked>> | 88% | 52,881 psi | 85% | 3045 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,376 psi | 90% | 3074 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,839 psi | 88% | 2992 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,765 psi | 85% | 3035 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,722 psi | 86% | 3058 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 94% | 53,969 psi | 87% | 3117 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 92% | 54,157 psi | 87% | 3074 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 84% | 54,839 psi | 88% | 3071 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,999 psi | 90% | 3104 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,810 psi | 88% | 3104 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,447 psi | 87% | 3153 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,592 psi | 57% | 1913 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,231 psi | 90% | 3074 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,274 psi | 89% | 3054 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,056 psi | 88% | 3048 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,607 psi | 88% | 3018 fps | 97.8% |
| IMR 4350 | <<locked>> | 96% | 53,650 psi | 86% | 3045 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,824 psi | 88% | 3051 fps | 97.8% |
| IMR 4831 | <<locked>> | 98% | 55,230 psi | 89% | 3107 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 54,128 psi | 87% | 3084 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,287 psi | 85% | 3009 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,172 psi | 87% | 3031 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,766 psi | 86% | 2986 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 54,795 psi | 88% | 3038 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,360 psi | 87% | 3045 fps | 98.9% |
| Lovex S070 | <<locked>> | 96% | 55,448 psi | 89% | 3081 fps | 98.2% |
| Norma 201 | <<locked>> | 86% | 56,318 psi | 90% | 3054 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,577 psi | 86% | 3002 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,564 psi | 89% | 3094 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,114 psi | 87% | 3091 fps | 96% |
| Norma MRPᴾ | <<locked>> | 100% | 48,225 psi | 77% | 3091 fps | 96.6% |
| Norma URP | <<locked>> | 96% | 53,838 psi | 86% | 3107 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 86% | 52,605 psi | 84% | 3061 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 52,518 psi | 84% | 3097 fps | 98.4% |
| Ramshot TAC | <<locked>> | 82% | 53,461 psi | 86% | 3025 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,272 psi | 85% | 3041 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,129 psi | 58% | 1959 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,998 psi | 87% | 3038 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,171 psi | 85% | 3117 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,214 psi | 85% | 3159 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,650 psi | 88% | 3143 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,824 psi | 86% | 3169 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 82% | 53,751 psi | 86% | 2982 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,432 psi | 86% | 2999 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 52,750 psi | 85% | 3038 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 56,376 psi | 90% | 3074 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,360 psi | 87% | 3045 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,172 psi | 87% | 3031 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,795 psi | 88% | 3038 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,448 psi | 89% | 3081 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,766 psi | 88% | 3104 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,579 psi | 89% | 3061 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 52,750 psi | 85% | 3025 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,317 psi | 87% | 2940 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,056 psi | 88% | 2940 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,404 psi | 87% | 2992 fps | 97.8% |
| Somchem S335 | <<locked>> | 84% | 53,795 psi | 86% | 2936 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,317 psi | 89% | 3048 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,084 psi | 85% | 3035 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,985 psi | 90% | 3166 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,576 psi | 83% | 3038 fps | 96.8% |
| Vihtavuori N133 | <<locked>> | 84% | 54,737 psi | 88% | 2927 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,606 psi | 86% | 2966 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,259 psi | 87% | 2982 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,636 psi | 88% | 3015 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,144 psi | 90% | 3104 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 53,563 psi | 86% | 3005 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,086 psi | 90% | 3028 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,317 psi | 89% | 3107 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,384 psi | 76% | 3031 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 52,605 psi | 84% | 3018 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,954 psi | 87% | 3058 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,969 psi | 87% | 3117 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,334 psi | 61% | 2966 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,434 psi | 90% | 3094 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 51,663 psi | 83% | 2904 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,947 psi | 70% | 2815 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,953 psi | 83% | 2989 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,354 psi | 74% | 2854 fps | 95.2% |
| Accurate 3100 | <<locked>> | 96% | 38,986 psi | 63% | 2792 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 41,611 psi | 67% | 2808 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 35,592 psi | 57% | 2736 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 47,747 psi | 77% | 2943 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 40,582 psi | 65% | 2782 fps | 97.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,922 psi | 80% | 2949 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,850 psi | 82% | 2933 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,874 psi | 70% | 2982 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,277 psi | 65% | 2802 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,352 psi | 70% | 2874 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 84% | 35,520 psi | 57% | 2756 fps | 95.9% |
| Alliant Reloder-17 | 61.6 gr | 80% | 35,056 psi | 56% | 2772 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 30,864 psi | 49% | 2648 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 92% | 36,172 psi | 58% | 2851 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,413 psi | 76% | 2949 fps | 98.9% |
| Bofors RP3 | <<locked>> | 80% | 40,045 psi | 64% | 2805 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 46,572 psi | 75% | 2897 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,430 psi | 82% | 2936 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,124 psi | 79% | 2972 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,944 psi | 66% | 2812 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 88% | 43,990 psi | 71% | 2927 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 88% | 47,659 psi | 76% | 2956 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 48,240 psi | 77% | 2956 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,574 psi | 49% | 2585 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,512 psi | 71% | 2923 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 90% | 46,876 psi | 75% | 3009 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,527 psi | 43% | 1713 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,238 psi | 74% | 2904 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 48,225 psi | 77% | 2946 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,612 psi | 68% | 2818 fps | 98.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,092 psi | 72% | 2844 fps | 95.8% |
| IMR 4350 | <<locked>> | 92% | 47,050 psi | 75% | 2923 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,527 psi | 73% | 2877 fps | 95.8% |
| IMR 4831 | <<locked>> | 84% | 34,461 psi | 55% | 2694 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 44,425 psi | 71% | 2904 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 49,922 psi | 80% | 2949 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,297 psi | 76% | 2920 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,398 psi | 76% | 2874 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 42,467 psi | 68% | 2818 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 39,610 psi | 64% | 2756 fps | 95.6% |
| Lovex S070 | <<locked>> | 88% | 42,931 psi | 69% | 2848 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 46,514 psi | 75% | 2887 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 47,065 psi | 75% | 2894 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,685 psi | 68% | 2861 fps | 98.9% |
| Norma 204 | <<locked>> | 94% | 50,531 psi | 81% | 3028 fps | 95.1% |
| Norma MRP | <<locked>> | 98% | 44,788 psi | 72% | 3018 fps | 95.6% |
| Norma URP | <<locked>> | 84% | 35,955 psi | 58% | 2743 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 42,583 psi | 68% | 2874 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 40,147 psi | 64% | 2848 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 49,937 psi | 80% | 2963 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,690 psi | 80% | 2982 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,905 psi | 43% | 1755 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,321 psi | 66% | 2795 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,224 psi | 74% | 2992 fps | 99% |
| ReloadSwiss RS 60 | 61.6 gr | 80% | 37,376 psi | 60% | 2844 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 35,534 psi | 57% | 2756 fps | 95.3% |
| ReloadSwiss RS 70 | 67.2 gr | 86% | 37,840 psi | 61% | 2828 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 50,502 psi | 81% | 2930 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,280 psi | 71% | 2838 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 37,739 psi | 61% | 2746 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 46,572 psi | 75% | 2897 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 84% | 39,610 psi | 64% | 2756 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,297 psi | 76% | 2920 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,467 psi | 68% | 2818 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 42,931 psi | 69% | 2848 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,914 psi | 62% | 2802 fps | 98% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,399 psi | 78% | 2936 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,282 psi | 74% | 2910 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,805 psi | 77% | 2838 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,972 psi | 64% | 2690 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 44,541 psi | 71% | 2815 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 47,427 psi | 76% | 2835 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,225 psi | 77% | 2933 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 38,363 psi | 62% | 2749 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 27,978 psi | 45% | 2562 fps | 96% |
| Somchem S385 | <<locked>> | 96% | 44,962 psi | 72% | 2913 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 48,298 psi | 77% | 2828 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,077 psi | 71% | 2815 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,744 psi | 72% | 2828 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,680 psi | 59% | 2684 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 35,056 psi | 56% | 2690 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 50,053 psi | 80% | 2946 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,105 psi | 69% | 2812 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 36,956 psi | 59% | 2746 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 90% | 33,591 psi | 54% | 2726 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,474 psi | 52% | 2602 fps | 96.8% |
| Winchester 748 | <<locked>> | 80% | 50,198 psi | 80% | 2995 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 43,990 psi | 71% | 2927 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,167 psi | 47% | 2667 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,006 psi | 74% | 2913 fps | 99.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 94 powders for .300 Win. Mag. loaded with the .308 | 150gr | Peregrine Plainsmaster (VLR-4). Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,186 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,186 fps. Accurate 3100 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 Win. Mag. with the .308 | 150gr | Peregrine Plainsmaster (VLR-4) they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.